639400

素因数分解:

$2^3\times 5^2\times {\mathrm{23}}^1\times {\mathrm{139}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 1562400

約数和(自身を除く): 923000

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 25, 40, 46, 50, 92, 100, 115, 139, 184, 200, 230, 278, 460, 556, 575, 695, 920, 1112, 1150, 1390, 2300, 2780, 3197, 3475, 4600, 5560, 6394, 6950, 12788, 13900, 15985, 25576, 27800, 31970, 63940, 79925, 127880, 159850, 319700, 639400]

約数ペア:

[(1, 639400), (2, 319700), (4, 159850), (5, 127880), (8, 79925), (10, 63940), (20, 31970), (23, 27800), (25, 25576), (40, 15985), (46, 13900), (50, 12788), (92, 6950), (100, 6394), (115, 5560), (139, 4600), (184, 3475), (200, 3197), (230, 2780), (278, 2300), (460, 1390), (556, 1150), (575, 1112), (695, 920)]